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- Which is the correct statement?Option: 1 Law of triads was proposed by DobereinerOption: 2
- #Chemistry
- #Classification of Elements and Periodic table
- #Joint Entrance Examination Main
- #Engineering
- #National Eligilibility Cum Entrance Test
Which is the correct statement?
Law of triads was proposed by Dobereiner
Law of octaves was proposed by Einstein
Both
None
Answers (1)
As we have learnt
Introduction of Periodic Table -
PROUT'S HYPOTHESIS
He simply assumed that all the elements are made up of hydrogen, so we can say that
Atomic weight of elements = n (Atomic weight of one hydrogen atom)
Atomic weight of H = 1 , where n = number of hydrogen atom = 1, 2, 3,..
Drawback or Limitation:
-
Ex. Every element can not be formed by Hydrogen.
-
The atomic weights of all elements were not found as whole numbers.
Ex. Chlorine (atomic weight 35.5) and Strontium (atomic weight 87.5)
-
Law of triads was proposed by Johann Dobereiner. Law of octaves was proposed by Newlands.
Therefore, the correct option is (1)
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